Malicious PDF — malware analysis report

Static analysis result for SHA-256 2745959e34c03cda…

MALICIOUS

PDF

83.3 KB Created: 2021-09-11 20:58:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 90c1859f8c777a9401612d4b644359dd SHA-1: f9964ecb7077fad2caa40743f84c990ee4afc4cd SHA-256: 2745959e34c03cdae749618a877cd4260587675673f11c6a4dba766e6942ba37
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate the document functions as a link farm, directing users to multiple potentially compromised websites hosted on disposable domains. The presence of numerous unknown URLs suggests an attempt to distribute malicious content or conduct phishing operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ourcampuswindow.com/ckfinder/userfiles/files/10878548546.pdf
    • http://landroverbh.com/ckfinder/userfiles/files/gofoxezubeb.pdf
    • https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/bec1b78e80b2838c37d36bec4c0016c3/morarebawulujajoru.pdf
    • http://sun-dr.com/uploads/files/202109020501395279.pdf
    • http://union.travel/ckfinder/userfiles/files/vonikonoreberirololet.pdf
    • http://studiolegalebisantis.it/userfiles/files/43289727559.pdf
    • https://arvikabc.com/images/uploadedimages/file/93463284064.pdf
    • https://daynexweb.com/upload/ckfinder/files/nofovubabozizovixusatar.pdf
    • http://www.swaving-stalinrichting.nl/ckfinder/userfiles/files/45975851130.pdf
    • https://signos.larrialdiak.es/files/galeria/files/tabijev.pdf
    • http://jocoseatee.com/userfiles/files/gonebofogigomawexoj.pdf
    • http://dinskayarealty.ru/media/file/73358876659.pdf
    • https://actionsporting.com/userfiles/files/xiregetopotobel.pdf
    • http://omonetach.pl/foto/ilustracje/file/satubifud.pdf
    • http://18554080.com/userfiles/file/45524822483.pdf
    • https://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/75e6cfd4e4bcaa2dd215aa3af22d7e85/39045746305.pdf
    • https://bibliotheque-des-arts.com/ckfinder/userfiles/files/79560351071.pdf
    • https://mchs.kz/userfiles/File/zusef.pdf
    • https://podereilmontaleo.it/writable/public/userfiles/file/28243124276.pdf
    • http://thanhcongtechtra.com/upload/files/pesufisunazezodobarejinad.pdf
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130e3b44e61a---9575048058.pdf
    • http://taeguektour.com/FileData/ckfinder/files/20210902_C97F8241D2F0C2A7.pdf
    • http://terrietanaka.com/library/files/49720906894.pdf
    • http://seritour.com/rsm/files/zapur.pdf
    • http://prttour.ca/FileData/ckfinder/files/20210903_67F88759739AC6BD.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=bahubali+2telugu+full+movie+com
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e070.bin
787046c3b388264fc0cbfeb8218a3193da51b5d3c120c2e4b7e9ed7e07ca862c
pdf-font-stream PDF embedded font (sfnt) at offset 0xE070 10892 bytes
font_01_sfnt_off0000f9be.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF9BE 16792 bytes
font_02_sfnt_off000111d0.bin
7952b634b0f85f38242d1927a99f76aab1ac23f6b876b3b7ce5bead6d92c30ba
pdf-font-stream PDF embedded font (sfnt) at offset 0x111D0 17924 bytes